Addressed both issues raised in review

Malformed values are now represented in result as None.

Skipped benchmarks are no longer dropped, i.e., they are present
in BenchmarkResult data, but they are not reflected in summary
table in line with what NVBench-instrumented benchmarks do.

python/scripts/nvbench_json_summary.py

@@ -143,6 +143,8 @@ def format_percentage(summary: BenchmarkResultSummary) -> str:
 
 
 def format_summary(summary: BenchmarkResultSummary) -> str:
+    if summary.value is None:
+        return ""
     if summary.hint == "duration":
         return format_duration(summary)
     if summary.hint == "item_rate":
@@ -215,6 +217,8 @@ def format_benchmark(result: BenchmarkResult, bench: SubBenchmarkResult) -> str:
         table = MarkdownTable()
         row = 0
         for state in bench.states:
+            if state.is_skipped:
+                continue
             if device_id is not None and state.device != device_id:
                 continue
             add_state_row(table, row, state, bench)